Issue 1292 in lilypond: Enhancement: twelve-notation support

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Enhancement Priority-Low

New issue 1292 by v.villenave: Enhancement: twelve-notation support
http://code.google.com/p/lilypond/issues/detail?id=1292

% Feature request by Nikolausius:
http://lists.gnu.org/archive/html/lilypond-user/2010-09/msg00680.html

Here's a link where the differences between several 12-tone notation
systems are shown and the system of J.M. HAuer is being explained:

http://www.klangreihenmusik.at/skriptum-zwoelftonnotenschr-01kl.php3

Werner:
Hauer's invention is the *second* system in the image; the lines
represent the black keys on a piano keyboard.

Neil:
The custom stave can be created by overriding StaffSymbol #'line-positions,  
then it's just a matter of mapping the notes to the correct positions with  
a custom layout function (via staffLineLayoutFunction).

It seems to me the only part which LilyPond doesn't support is the special  
leger lines below the stave: though the middle C superficially looks like a  
G, it's positioned as if it were an E, but with the first leger missing (so  
the leger lines continue the line-positioning pattern outside the stave).